Volume 9, Issue 4 2401195
Research Article

High-Power and Long-Lifespan Rechargeable Ion Batteries based on Na+-Confined Na+/Mg2+ Coinsertion Chemistry

Fuyu Chen

Fuyu Chen

National Innovation Center for lndustry-Education Integration of Energy Storage Technology, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044 China

National Magnesium Alloy Material Engineering Technology Research Center, Chongqing University, Chongqing, 400044 China

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Hong-Yi Li

Corresponding Author

Hong-Yi Li

National Innovation Center for lndustry-Education Integration of Energy Storage Technology, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044 China

National Magnesium Alloy Material Engineering Technology Research Center, Chongqing University, Chongqing, 400044 China

E-mail: [email protected]; [email protected]

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Qing Zhong

Qing Zhong

National Innovation Center for lndustry-Education Integration of Energy Storage Technology, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044 China

National Magnesium Alloy Material Engineering Technology Research Center, Chongqing University, Chongqing, 400044 China

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Zijie Cai

Zijie Cai

National Innovation Center for lndustry-Education Integration of Energy Storage Technology, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044 China

National Magnesium Alloy Material Engineering Technology Research Center, Chongqing University, Chongqing, 400044 China

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Dong Wang

Dong Wang

National Innovation Center for lndustry-Education Integration of Energy Storage Technology, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044 China

National Magnesium Alloy Material Engineering Technology Research Center, Chongqing University, Chongqing, 400044 China

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Jiang Diao

Jiang Diao

National Innovation Center for lndustry-Education Integration of Energy Storage Technology, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044 China

National Magnesium Alloy Material Engineering Technology Research Center, Chongqing University, Chongqing, 400044 China

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Guangsheng Huang

Guangsheng Huang

National Innovation Center for lndustry-Education Integration of Energy Storage Technology, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044 China

National Magnesium Alloy Material Engineering Technology Research Center, Chongqing University, Chongqing, 400044 China

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Jingfeng Wang

Jingfeng Wang

National Innovation Center for lndustry-Education Integration of Energy Storage Technology, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044 China

National Magnesium Alloy Material Engineering Technology Research Center, Chongqing University, Chongqing, 400044 China

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Fusheng Pan

Corresponding Author

Fusheng Pan

National Innovation Center for lndustry-Education Integration of Energy Storage Technology, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044 China

National Magnesium Alloy Material Engineering Technology Research Center, Chongqing University, Chongqing, 400044 China

National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing, 400044 China

E-mail: [email protected]; [email protected]

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First published: 31 October 2024
Citations: 1

Abstract

Magnesium–sodium hybrid ion batteries (MSHIBs) are expected to achieve excellent rate capability. However, existing MSHIB cathodes exhibit low ionic conductivity and poor structural stability, resulting in low power density and cycle lifespan. Herein, sodium-rich Na3.7V6O16·2.9H2O (Na-rich NVO) nanobelts are synthesized as MSHIB cathodes. Excess Na+ induced NaO5 and NaO3 interlayer pins, which ensures NVO structural stability to accommodate Mg2+ and Na+. They also confine the migration pathway of cations to the diffusion direction, lowering the migration barriers of Mg2+ and enhancing the ionic conductivity. Excess interlayer Na+ increases the electronic conductivity of the involved Na-rich NVO cathode. The cathode exhibits a high Mg2+ diffusion coefficient, and the resulting MSHIBs exhibit a power density of 3.4 kW kg−1 and a lifespan of 20 000 cycles at 5.0 A g−1, with a capacity retention rate of 85%. Overall, this study paves the way for designing and developing fast-charging secondary batteries.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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